Railroad Archives Online
- CollectionE0018 - Norm Keyes Collection
- Series003 - Great Northern Railway Company (U.S.)
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3001 - Steam Locomotives
- 438 more...
- Item40.S.52.07 - Great Northern Steam Locomotive 523 at Great Falls, Montana, 1949
- Item40.S.52.08 - Great Northern Steam Locomotive 521 at Hillyard, Washington, 1946
- Item40.S.52.09 - Great Northern Steam Locomotive 523 at Great Falls, Montana, 1949
- Item40.S.52.10 - Great Northern Steam Locomotive 525, undated
- Item40.S.52.11 - Great Northern Steam Locomotive 527 at Hillyard, Washington, 1946
- Item40.S.52.12 - Great Northern Steam Locomotive 538, undated
- Item40.S.52.13 - Great Northern Steam Locomotive 545 at Burlington, Washington, 1947
- Item40.S.52.18 - Great Northern Steam Locomotive 511, undated
- Item40.S.52.20 - Great Northern Steam Locomotive 545, undated
- 628 more...